Asian shares nervous ahead of China data

Asian shares were skittish in early on Tuesday after logging their worst month in three years and the dollar struggled as investors braced for data from China that could raise fresh fears about the health of its economy. Losses on Wall Street also soured sentiment after comments from Federal Reserve Vice Chairman Stanley Fischer heightened fears among investors of a potential U.S. interest hike in September. China's official factory sector activity likely shrank at its fasted pace in three years